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12 January, 19:00

For which of the following molecular formulas is the formula shown in parentheses the correct empirical formula? (a) C12H22O11 (C12H22O11), (b) C8H12O4 (C4H6O2), (c) H2O2 (H2O) ?

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  1. 12 January, 19:09
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    C₁₂H₂₂O₁₁ (C₁₂H₂₂O₁₁).

    Explanation:

    The empirical formula is obtained when we divide the molecular formula with a whole number giving the simplest ratio of all the elements (in whole number).

    a) C₁₂H₂₂O₁₁:

    There is no number with which we can divide the ratio further to get a simpler formula hence the molecular formula of the given compound is the empirical formula of the compound. Hence it is correct.

    (C₁₂H₂₂O₁₁),

    (b) C₈H₁₂O₄

    The empirical formula can be obtained by dividing the formula with "4"

    The empirical formula would be

    (C₂H₃O)

    (c) H₂O₂

    The empirical formula would be (H₁O₁)
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